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Commit 54f315cb authored by Ido Yariv's avatar Ido Yariv Committed by Luca Coelho
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iwlwifi: pcie: Enable MSI mode when using MSI interrupts 



On some of the chipsets MSI & INTA interrupts are disabled by default in
the HW registers, and need to be explicitly enabled to be used.

In case MSI-X isn't used, make sure MSI mode is enabled by setting
the relevant HW register.

Signed-off-by: default avatarIdo Yariv <idox.yariv@intel.com>
Signed-off-by: default avatarLuca Coelho <luciano.coelho@intel.com>
parent da2830ac

drivers/net/wireless/intel/iwlwifi/iwl-prph.h

+1 −0
Original line number Diff line number Diff line
@@ -417,5 +417,6 @@ enum { 
};



#define UREG_CHICK		(0xA05C00)

#define UREG_CHICK_MSI_ENABLE	BIT(24)

#define UREG_CHICK_MSIX_ENABLE	BIT(25)

#endif				/* __iwl_prph_h__ */

drivers/net/wireless/intel/iwlwifi/pcie/trans.c

+5 −1
Original line number Diff line number Diff line
@@ -1396,8 +1396,12 @@ static void iwl_pcie_init_msix(struct iwl_trans_pcie *trans_pcie) 


	max_rx_vector = trans_pcie->allocated_vector - 1;



	if (!trans_pcie->msix_enabled)

	if (!trans_pcie->msix_enabled) {

		if (trans->cfg->mq_rx_supported)

			iwl_write_prph(trans, UREG_CHICK,

				       UREG_CHICK_MSI_ENABLE);

		return;

	}



	iwl_write_prph(trans, UREG_CHICK, UREG_CHICK_MSIX_ENABLE);